lib/python/Components/Harddisk.py

   1 from os import system, listdir, statvfs, popen
   2
   3 from Tools.Directories import SCOPE_HDD, resolveFilename
   4 from Tools.CList import CList
   5
   6 def tryOpen(filename):
   7         try:
   8                 procFile = open(filename)
   9         except IOError:
  10                 return ""
  11         return procFile
  12
  13 def num2prochdx(num):
  14         return "/proc/ide/hd" + ("a","b","c","d","e","f","g","h","i")[num] + "/"
  15
  16 class Harddisk:
  17         def __init__(self, index):
  18                 self.index = index
  19
  20                 host = self.index / 4
  21                 bus = (self.index & 2)
  22                 target = (self.index & 1)
  23
  24                 self.prochdx = num2prochdx(index)
  25                 self.devidex = "/dev/ide/host%d/bus%d/target%d/lun0/" % (host, bus, target)
  26
  27         def getIndex(self):
  28                 return self.index
  29
  30         def bus(self):
  31                 ret = ""
  32
  33                 if self.index & 2:
  34                         ret = "External (CF) - "
  35                 else:
  36                         ret = "Internal - "
  37
  38                 if self.index & 1:
  39                         return ret + "Slave"
  40                 else:
  41                         return ret + "Master"
  42
  43         def capacity(self):
  44                 procfile = tryOpen(self.prochdx + "capacity")
  45
  46                 if procfile == "":
  47                         return ""
  48
  49                 line = procfile.readline()
  50                 procfile.close()
  51
  52                 try:
  53                         cap = int(line)
  54                 except:
  55                         return ""
  56
  57                 cap = cap / 1000 * 512 / 1000
  58
  59                 return "%d.%03d GB" % (cap/1024, cap%1024)
  60
  61         def model(self):
  62                 procfile = tryOpen(self.prochdx + "model")
  63
  64                 if procfile == "":
  65                         return ""
  66
  67                 line = procfile.readline()
  68                 procfile.close()
  69
  70                 return line.strip()
  71
  72         def free(self):
  73                 procfile = tryOpen("/proc/mounts")
  74
  75                 if procfile == "":
  76                         return -1
  77
  78                 free = -1
  79                 while 1:
  80                         line = procfile.readline()
  81                         if line == "":
  82                                 break
  83                         if line.startswith(self.devidex):
  84                                 parts = line.strip().split(" ")
  85                                 try:
  86                                         stat = statvfs(parts[1])
  87                                 except OSError:
  88                                         continue
  89                                 free = stat.f_bfree/1000 * stat.f_bsize/1000
  90                                 break
  91                 procfile.close()
  92                 return free
  93
  94         def numPartitions(self):
  95                 try:
  96                         idedir = listdir(self.devidex)
  97                 except OSError:
  98                         return -1
  99                 numPart = -1
 100                 for filename in idedir:
 101                         if filename.startswith("disc"):
 102                                 numPart += 1
 103                         if filename.startswith("part"):
 104                                 numPart += 1
 105                 return numPart
 106
 107         def unmount(self):
 108                 cmd = "/bin/umount " + self.devidex + "part*"
 109                 res = system(cmd)
 110                 return (res >> 8)
 111
 112         def createPartition(self):
 113                 cmd = "/sbin/sfdisk -f " + self.devidex + "disc"
 114                 sfdisk = popen(cmd, "w")
 115                 sfdisk.write("0,\n;\n;\n;\ny\n")
 116                 sfdisk.close()
 117                 return 0
 118
 119         def mkfs(self):
 120                 cmd = "/sbin/mkfs.ext3 -T largefile -m0 " + self.devidex + "part1"
 121                 res = system(cmd)
 122                 return (res >> 8)
 123
 124         def mount(self):
 125                 cmd = "/bin/mount -t ext3 " + self.devidex + "part1 /hdd"
 126                 res = system(cmd)
 127                 return (res >> 8)
 128
 129         def createMovieFolder(self):
 130                 res = system("mkdir " + resolveFilename(SCOPE_HDD))
 131                 return (res >> 8)
 132
 133         errorList = [ _("Everything is fine"), _("Creating partition failed"), _("Mkfs failed"), _("Mount failed"), _("Create movie folder failed"), _("Unmount failed")]
 134
 135         def initialize(self):
 136                 self.unmount()
 137
 138                 if self.createPartition() != 0:
 139                         return -1
 140
 141                 if self.mkfs() != 0:
 142                         return -2
 143
 144                 if self.mount() != 0:
 145                         return -3
 146
 147                 if self.createMovieFolder() != 0:
 148                         return -4
 149
 150                 return 0
 151
 152 def existHDD(num):
 153         mediafile = tryOpen(num2prochdx(num) + "media")
 154
 155         if mediafile == "":
 156                 return -1
 157
 158         line = mediafile.readline()
 159         mediafile.close()
 160
 161         if line.startswith("disk"):
 162                 return 1
 163
 164         return -1
 165
 166 class Partition:
 167         def __init__(self, mountpoint, description = "", force_mounted = False):
 168                 self.mountpoint = mountpoint
 169                 self.description = description
 170                 self.force_mounted = force_mounted
 171
 172         def stat(self):
 173                 return statvfs(self.mountpoint)
 174
 175         def free(self):
 176                 try:
 177                         s = self.stat()
 178                         return s.f_bavail * s.f_bsize
 179                 except OSError:
 180                         return None
 181
 182         def total(self):
 183                 try:
 184                         s = self.stat()
 185                         return s.f_blocks * s.f_bsize
 186                 except OSError:
 187                         return None
 188
 189         def mounted(self):
 190                 # THANK YOU PYTHON FOR STRIPPING AWAY f_fsid.
 191                 # TODO: can os.path.ismount be used?
 192                 if self.force_mounted:
 193                         return True
 194                 procfile = tryOpen("/proc/mounts")
 195                 for n in procfile.readlines():
 196                         if n.split(' ')[1] == self.mountpoint:
 197                                 return True
 198                 return False
 199
 200 class HarddiskManager:
 201         def __init__(self):
 202                 hddNum = 0
 203                 self.hdd = [ ]
 204
 205                 self.partitions = [ ]
 206
 207                 self.on_partition_list_change = CList()
 208
 209                 for hddNum in range(8):
 210                         if existHDD(hddNum):
 211                                 hdd = Harddisk(hddNum)
 212                                 self.hdd.append(hdd)
 213
 214                 # currently, this is just an enumeration of what's possible,
 215                 # this probably has to be changed to support automount stuff.
 216                 # still, if stuff is mounted into the correct mountpoints by
 217                 # external tools, everything is fine (until somebody inserts
 218                 # a second usb stick.)
 219                 p = [
 220                                         ("/media/hdd", _("Harddisk")),
 221                                         ("/media/card", _("Card")),
 222                                         ("/media/cf", _("Compact Flash")),
 223                                         ("/media/mmc1", _("MMC Card")),
 224                                         ("/media/net", _("Network Mount")),
 225                                         ("/media/ram", _("Ram Disk")),
 226                                         ("/media/usb", _("USB Stick")),
 227                                         ("/", _("Internal Flash"))
 228                                 ]
 229
 230                 for x in p:
 231                         self.partitions.append(Partition(mountpoint = x[0], description = x[1]))
 232
 233         def getAutofsMountpoint(self, device):
 234                 return "/autofs/%s/" % (device)
 235
 236         def addHotplugPartition(self, device, description):
 237                 p = Partition(mountpoint = self.getAutofsMountpoint(device), description = description, force_mounted = True)
 238                 self.partitions.append(p)
 239                 self.on_partition_list_change("add", p)
 240
 241         def removeHotplugPartition(self, device):
 242                 mountpoint = self.getAutofsMountpoint(device)
 243                 for x in self.partitions[:]:
 244                         if x.mountpoint == mountpoint:
 245                                 self.partitions.remove(x)
 246                                 self.on_partition_list_change("remove", x)
 247
 248         def HDDCount(self):
 249                 return len(self.hdd)
 250
 251         def HDDList(self):
 252                 list = [ ]
 253                 for hd in self.hdd:
 254                         hdd = hd.model() + " ("
 255                         hdd += hd.bus()
 256                         cap = hd.capacity()
 257                         if cap != "":
 258                                 hdd += ", " + cap
 259                         hdd += ")"
 260                         list.append((hdd, hd))
 261
 262                 return list
 263
 264         def getMountedPartitions(self):
 265                 return [x for x in self.partitions if x.mounted()]
 266
 267 harddiskmanager = HarddiskManager()